Participant recruitment At the moment 215 children and youth have given informed consent that they will participate in the evaluation of the original study. Recruitment to the original study is still ongoing and the investigators expect the total participation to be around 250. The questionnaire survey in the present study is a follow up survey of the original study which will be performed 1-2½ years after the participant have left the original study. The present study will be performed in 4 waves. The first wave will be performed in November 2012 and will include participants who have left the original study 1-2½ years ago. The second, third and fourth waves will be performed May 2013, November 2013 and May 2014, respectively, 1-1½ years after the participants have left the original study. The outcome will be measured over a perod of 1½ years.